Jacob Jensen Mylock brushed aluminium. Works completely without a key or code Applies to doors where the rotor is located above the handle For example, by SMS you can send limited access to a handyman - Can be set to lock it automatically The key can still be used from the outside The MyLock can be manually rotated from the inside Easy for children and the elderly Does not require insurance authorization Uses 4 pieces. 123AP - 3 volt batteries (not included) Series: Jacob Jensen Article number: 270331 Color: Black Material: metal Dimensions: HxØ 5x8 cm